Okay, this is truly mad science, but attached is an initial attempt to activate Maple Ridge Thunderbolt Bus with just an SSDT. Some notes:
- Disable any previous Thunderbolt SSDT
- However, keep SSDT-DTPG.aml enabled
- Maple Ridge does not seem to use a typical line-level interrupt to signal a hot-plug event
- There is no Thunderbolt-specific _GPE._Lxx method
- However, this capability might have moved to the USB event handler AL6F in SSDT-6, which is coupled to line-level event _L6F
- The attached SSDT makes no attempt to handle hot plug events; it only attempts to put the Maple Ridge controller into OS Managed Mode
After installing the SSDT, simply reboot and post screenshot of
RP05 section of IORegistryExplorer.
Probability of success for this 1st attempt: Close to 0%